CVE-2026-74905— 思源笔记 v3.7.4 前 SSRF 漏洞
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一、 漏洞 CVE-2026-74905 基础信息
漏洞信息
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Vulnerability Title
SiYuan before v3.7.4 SSRF via IPv6 Transition Address Bypass
来源: CVE Program / CVE List V5
Vulnerability Description
SiYuan before v3.7.4 contains a server-side request forgery (SSRF) vulnerability in the isPrivateIP function in kernel/util/net.go, used by SSRFSafeDialer to enforce SSRF protection in SafeMode. The function only checks for loopback, link-local unicast, private, and unspecified addresses and does not recognize IPv6 transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo 2001::/32) that embed private IPv4 destinations. When SafeMode is enabled, an authenticated attacker can bypass the SSRF guard via the network forward proxy, WebSocket proxy, or SSE proxy endpoints by supplying a URL whose hostname resolves to such a transition address, reaching internal services and cloud metadata endpoints (e.g., 169.254.169.254). Because the forward proxy returns the full response body, this is a full-read SSRF that can be used to steal instance credentials, reach internal services, and port-scan internal infrastructure.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| siyuan-note | siyuan | 0 ~ 3.7.4 | - |
二、漏洞 CVE-2026-74905 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-74905 厂商安全公告 (1)
CVE-2026-74905 其他参考 (1)
同批安全公告 · siyuan-note · 2026-08-18 · 共 5 条
| CVE-2026-74902 | 8.6 HIGH | 思源笔记 <3.7.4 恶意文件名上传导致远程代码执行漏洞 |
| CVE-2026-74906 | 7.5 HIGH | 思源笔记 v3.7.4 前发布访问错误授权漏洞 |
| CVE-2026-74904 | 7.5 HIGH | 思源笔记 v3.7.4 前 block API 未授权访问漏洞 |
| CVE-2026-74903 | 4.3 MEDIUM | 思源笔记 v3.7.4前 权限控制不足漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-74905
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